AD7440BRTZ-R2 查看數據表（PDF） - Analog Devices
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AD7440BRTZ-R2 Datasheet PDF : 28 Pages
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AD7440/AD7450A
AD7440/AD7450A–TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, fS = 1 MSPS, fSCLK = 18 MHz, unless otherwise noted.
75
0
VDD = 5.25V VDD = 4.75V
–20
70
–40
VDD = 3.6V
–60
65
VDD = 2.7V
–80
8192 POINT FFT
fSAMPLE = 1MSPS
fIN = 100kSPS
SINAD = +71.7dB
THD = –82dB
SFDR = –83dB
–100
60
–120
55
10
100
FREQUENCY (kHz)
1000
Figure 7. AD7450A SINAD vs. Analog Input Frequency for Various
Supply Voltages
–140
0
100
200
300
400
500
FREQUENCY (kHz)
Figure 10. AD7450A Dynamic Performance with VDD = 5 V
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
10
VDD = 3V
VDD = 5V
100
1000
FREQUENCY (kHz)
10000
Figure 8. CMRR vs. Frequency for VDD = 5 V and 3 V
0
100mV p-p SINEWAVE ON VDD
NO DECOUPLING ON VDD
–20
–40
–60
VDD = 3V
–80
VDD = 5V
–100
–120
0
100 200 300 400 500 600 700 800 900 1000
SUPPLY RIPPLE FREQUENCY (kHz)
Figure 9. PSRR vs. Supply Ripple Frequency without Supply Decoupling
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
1024
2048
CODE
3072
4096
Figure 11. Typical DNL for the AD7450A for VDD = 5 V
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
1024
2048
CODE
3072
4096
Figure 12. Typical INL for the AD7450A for VDD = 5 V
Rev. C | Page 12 of 28
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